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I <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client: ARCO Products Company Service Request: S9701747 <br /> Project- 20805-146 010/TO#20682 0012168 STOCKTON Date Analyzed: 9112/97 <br /> Initial Calibration Verification(ICV)Summary <br /> BTEX and Total Volatile Hydrocarbons <br /> Sample Name ICV Units mg/m3 <br /> Lab Code ICV1 Basis NA <br /> Test Notes <br /> ICV Source <br /> Prep Analysts True Percent CAS Acceptance <br /> Analyte Method Method Value Result Recovery Limits <br /> Benzene 5030 8020 25 24 96 80-120 <br /> Toluene 5030 8020 25 26 104 80-120 <br /> Ethylbenzene 5030 8020 25 26 104 80-120 <br /> Xylenes,Total 5030 8020 75 79 105 80-120 <br /> Gasoline 5030 8015M 250 240 96 80-120 <br /> • <br /> �. 1cv101121v6 <br /> Page 10 <br />